92 Bonneville no heat - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-12-2012, 04:12 PM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Feb 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
JoshuaBonnie is on a distinguished road
Angry 92 Bonneville no heat

Hey I need some idea on how to fix the no heat situation on my stepsons bonneville. I first thought it was the heater core being stopped up so I flushed it and got it running clean put it back together got the car started up and still no heat. I bleed the system Like I thought I was supposed and still no heat.

I did check to see if the acutator arm is moving and it is. The upper heater core hose is warm but not hot.

So any ideas.
JoshuaBonnie is offline   Reply With Quote
Old 02-12-2012, 08:11 PM   #2
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Is the coolant coming up to normal operating temperature? If not, you should replace the thermostat. If the engine is up to normal temp and you don't have heat, the blend door is probably not operating. The 92 Bonneville has a vacuum operated HVAC control system. The vacuum manifold is behind the glove box. There is a write on this forum that explains how to diagnose and fix it. I will look for it in a minute.
2kg4u is offline   Reply With Quote
Old 02-12-2012, 09:47 PM   #3
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Feb 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
JoshuaBonnie is on a distinguished road
Default

Now I have seen the actuator move and heard the door open and shut. It appears that it heating up to operating temp but I am not positive. I think I will try a complete engine flush with a new thermostate and see what happen unless some else has an idea.

Thanks

Josh
JoshuaBonnie is offline   Reply With Quote
Old 02-13-2012, 09:37 AM   #4
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Read both of these posts:

https://www.gmforum.com/mechanical-134/climate-control-diagnostic-88-93-a-285427/

https://www.gmforum.com/mechanical-134/default-redirect-cooled-air-late-model-gm-cars-96-2000-a-279092/

Does your car have a temp gage? If so, what does it read when up to full operating temperature?
2kg4u is offline   Reply With Quote
Old 02-13-2012, 03:40 PM   #5
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Feb 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
JoshuaBonnie is on a distinguished road
Default

It reads about 185 on the in dash gauge. Was thinking about doing a flush and replace the thermostat . So those wright ups are for the non electronic system?
JoshuaBonnie is offline   Reply With Quote
Old 02-13-2012, 04:58 PM   #6
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Yes, the writes ups are for the vacuum controlled system and should apply directly to your car.

If it was my car, I would start with changing the thermostat.
2kg4u is offline   Reply With Quote
Old 02-13-2012, 09:05 PM   #7
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Feb 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
JoshuaBonnie is on a distinguished road
Default

thanks I think I am going to do that same thing along with a flush . correct me if I am wrong but this car does not have a heat control valve
JoshuaBonnie is offline   Reply With Quote
Old 02-14-2012, 09:10 AM   #8
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Quote:
Originally Posted by JoshuaBonnie View Post
thanks I think I am going to do that same thing along with a flush . correct me if I am wrong but this car does not have a heat control valve
If you mean some sort of shut off that controls coolant flow to the heater core, no, it does not have one.
2kg4u is offline   Reply With Quote
Old 02-14-2012, 10:08 AM   #9
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Feb 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
JoshuaBonnie is on a distinguished road
Default

Okay I did the flush and replaced the thermostate and now it does get up to 195 but still no heat I guess I will be looking at Vacum lines. I did notice some lines on the engine that need to be replaced.
JoshuaBonnie is offline   Reply With Quote
Old 02-14-2012, 03:50 PM   #10
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Quote:
Originally Posted by JoshuaBonnie View Post
Okay I did the flush and replaced the thermostate and now it does get up to 195 but still no heat I guess I will be looking at Vacum lines. I did notice some lines on the engine that need to be replaced.
Start with the vacuum source that starts in the engine bay and connects to the HVAC vacuum manifold. Do you have a vacuum gage? If so, pull the hose off the manifold and see what vacuum you are getting.
2kg4u is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Runs hot - no heat - then temp drops and heat works?? atp 2000-2005 15 12-16-2009 07:46 AM
Heat blowing cold + flashing heat controls after 20 sec chilump 1992-1999 23 02-08-2007 11:48 AM
'98 Bonneville gauges bounce irradically and no heat. b6e2k5 1992-1999 12 01-14-2006 01:07 PM
T-Stat,IAT,Heat Shield,G-Tech Bonneville Curb weight ComfyCar Performance, Brainstorming & Tuning 24 05-25-2005 12:50 AM
Anyone here heat with oil heat? I have questions? h1081dan Lounge 3 11-14-2004 05:22 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:53 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.